When the 520 bridge design is finally agreed on, the digging will begin. What will we find underground? There are already several major construction projects digging deep under Seattle's urban center. In addition to all the dirt, they may be removing artifacts of this city's storied history. If the deep–bore tunnel ends up going right through a Native American village site, what happens to the construction project? What happens to the artifacts that are recovered? Who pays for the archaeological surveys? What can we learn about Seattle's hidden history from the mega–construction projects?